45w charging times. Disappointing Unfortunately

[Mooncatt]

Should I really be keeping it between 40-80% only and not let it go below 25%? Especially on my Note 8 after a year my battery life started sucking!

That's still the general recommendation. This is pretty much the end all, be all article on Li-ion care and where we get much of our battery info:

https://batteryuniversity.com/index.php/learn/article/how_to_prolong_lithium_based_batteries

The absolute best practice for battery longevity in that article is much more strict than the 40-80% recommendation we usually give. Other factors come in to play in the real world, such as usage habits, replacement costs and convenience. It use to not matter much when batteries were cheap and easy to replace. Now that manufacturers are trying to force us into sealed batteries that cost a lot more time and money to replace, it's more important to care for what you have.

 

[KruseLudsMobile]

That still only tells us what's going into the phone, not what's going into the battery. Even when looking at speciality batteries I know are rated for higher charge speeds on stand alone programmable chargers, they still follow the standard Li-ion charge protocols. Stage one is constant max current and a rise in voltage. During this stage, the charger still keeps it at around 4.2V input and the charging speed comes from the current. At stage two, it saturates at a constant 4.2V and amperage goes down until cutoff. Phone batteries do go just a bit higher to 4.3V, but I've never seen a Li-ion battery get 15V input unless it was a multi-cell pack in series (phones were single cell). This video shows what can happen if you use too high voltage.

https://youtu.be/osfgkFyq7lA

Yes only what is going into the phone. Here is a test I did with real-world results. The online meter is very cheap. Please do this with the other charger you are mentioning, it will take you about an hour to do each, then pay the results here, thank you.

 

[KruseLudsMobile]

sounds like you need a different cable for the 45w charger then

When I first did the below test I had what I thought was a great cable - but the on-line meter is SO GREAT for seeing this - you CANNOT go by looks alone for any cable I guess :-(

 

[corvette72778]

When I first did the below test I had what I thought was a great cable - but the on-line meter is SO GREAT for seeing this - you CANNOT go by looks alone for any cable I guess :-(

This is fantastic! Thank you. Can you do the same test with the 45w Samsung charger when it's available? It would be really beneficial to know the same info with 45w charging.

 

[KruseLudsMobile]

This is fantastic! Thank you. Can you do the same test with the 45w Samsung charger when it's available? It would be really beneficial to know the same info with 45w charging.

I plan on it!

 

[corvette72778]

I plan on it!

Is it possible you can do the same test with the old Samsung 15w charger in the meantime?

 

[corvette72778]

https://youtu.be/hFpoKirn_Tg

wow! 5 minute total time difference. And at 50 min its actually the same charge levels with both chargers! The 45w charger is a terrible buy!

 

[KruseLudsMobile]

I will do my own version of the test again for the 45W charger when I get it too... May I ask however, what is the last column in your chart because the header of the column is chopped off. Is that the Note 10+ 5G version? And is there any difference with the charging for the 5G vs. Non-5G Note 10+ ? And from where were those numbers obtained (see my chart that was a test I did myself) - ? Thank you in advance for your response...

 

[corvette72778]

I will do my own version of the test again for the 45W charger when I get it too... May I ask however, what is the last column in your chart because the header of the column is chopped off. Is that the Note 10+ 5G version? And is there any difference with the charging for the 5G vs. Non-5G Note 10+ ? And from where were those numbers obtained (see my chart that was a test I did myself) - ? Thank you in advance for your response...

I reposted the chart. The last column was the Note 10+ @45w. It came from the video in the link. Your test was really good because it shows rate of charging and temps. I'm looking forward to seeing the results of your testing of the 45w charger. Temperatures will be interesting to see. I am curious if the temps go higher on the 45w vs the 25w charger or the same temps.

 

[nonie]

Does a cable come with the 45w charger?

 

[Jaycemiskel]

Does a cable come with the 45w charger?

Yep

 

[nonie]

Yep

Thanks

 

[KruseLudsMobile]

45W chargers according to the standard charge by 15Vx3A=45W. The Note 10+ can handle only a maximum of 10Vx4.5A=45W, the way the Samsung custom 45W custom chargers work. Therefore your charger (which although 45W, is not Samsung) is only charging at (the maximum voltage the Note 10+ will take, which is 10V - look in ABOUT in your settings menu!), (and the maximum amperage your charger will output, which is probably 3A), so your highest wattage for the charging in your case would most likely be 30W (=10Vx3A). You should buy an in-line meter like I did and then you can see what is really going on. Try different cables too, the only cables guaranteed to work are those that are USB 3.1 Gen2 (5A) cables, which have USB Type-C connectors at each end (even a lousy adapter for the connector will sometimes disrupt the more complicated connection between the 45W power supply and the phone): https://www.amazon.com/gp/product/B...ag=hawk-future-20&ascsubtag=UUacUvbUpU6625387

 

[toenail_flicker]

45W chargers according to the standard charge by 15Vx3A=45W. The Note 10+ can handle only a maximum of 10Vx4.5A=45W, the way the Samsung custom 45W custom chargers work. Therefore your charger (which although 45W, is not Samsung) is only charging at (the maximum voltage the Note 10+ will take, which is 10V - look in ABOUT in your settings menu!), (and the maximum amperage your charger will output, which is probably 3A), so your highest wattage for the charging in your case would most likely be 30W (=10Vx3A). You should buy an in-line meter like I did and then you can see what is really going on. Try different cables too, the only cables guaranteed to work are those that are USB 3.1 Gen2 (5A) cables, which have USB Type-C connectors at each end (even a lousy adapter for the connector will sometimes disrupt the more complicated connection between the 45W power supply and the phone): https://www.amazon.com/gp/product/B...ag=hawk-future-20&ascsubtag=UUacUvbUpU6625405

what about for car charging the C to C won't work, will it?

 

[KruseLudsMobile]

what about for car charging the C to C won't work, will it?

The type of connector shouldn't matter if the required connections are kept between the charger and the phone, as they talk to each other and any loss in those connections "ruins" the conversation. I did see someone however comment that a typical cars' power supply is not powerful enough to supply the expected Voltage and Amperage. I don't know the math on that though!

 

[CKwik240]

what about for car charging the C to C won't work, will it?

It will charge. The question is at what rate. And that will be determined by the compatibility between the charger, cable, and phone. It's just not a simple answer anymore.

 

[toenail_flicker]

I did see someone however comment that a typical cars' power supply is not powerful enough to supply the expected Voltage and Amperage.

this is the other part of my worry. Samsung isn't selling any so what am I to do? my car charging gear is all older gen and I need to upgrade it to something that will actually charge this 10+. what's a body in my situation to do?

 

[KruseLudsMobile]

this is the other part of my worry. Samsung isn't selling any so what am I to do? my car charging gear is all older gen and I need to upgrade it to something that will actually charge this 10+. what's a body in my situation to do?

It'll still charge it, just slower. I use Proclip in the car (although there isn't a holder that will fit (yet))... Delayed as usual when new models come out...

 

[Mooncatt]

I did see someone however comment that a typical cars' power supply is not powerful enough to supply the expected Voltage and Amperage. I don't know the math on that though!

Car power outlets are rated 12V at 10A (120 watts), and many rated at 20A (240 watts), give or take a bit depending on if the alternator is charging it. No question its technically possible to have a 45W charger pushing 10V at 4.5A. It's just a matter of using the right circuitry to regulate voltage, just like they do with current car chargers. It always seems home chargers are first to get the new technologies, so I expect car chargers to come out sooner or later.

 

[toenail_flicker]

thank you both. I'm looking around to see what I can find in the meanwhile